Check and adjust hydraulic limiter

AR46.25-G-3090F

Check and adjust hydraulic limiter

07.08.2013

MODEL

437.467

with steering RBL C 700 V

1

Steering gear

2

Pressure line

3

Connection fitting

4

Test connection

5

Test hose

6

Pressure gage

1

Steering gear

7

Cover

8

Left end limiting adjustment screw

9

Right end limiting adjustment screw

10

Cover



Check

 Danger !

Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.

No parts of the body or limbs should be within the operating area of the mechanism when the components are moving.

AS00.00-Z-0009-01A

 Danger !

Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure.Risk of poisoning from swallowing hydraulic fluid.

Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.

AS00.00-Z-0013-01A

1

Open engine hood

 See information from vehicle manufacturer.

2

Steering gear ( 1 ) in area of pressure line ( 2 Cleaning

3

Raise front axle and lower onto jack stands

 The wheels must move easily.

4

Check wheel angle and adjust if necessary

 If the wheel angle is changed, the hydraulic limiter must be adjusted.

5

Check center steering position on steering gear ( 1 ) adjust if necessary

Check and adjust center steering position on steering gear

AR46.20-G-3015CA

6

Print out test log for steering



Error list for steering, form

OF46.25-G-3000-01A

 Document the following tests with the steering test log .

7

Detach pressure line ( 2 ) from steering gear ( 1 )


When opening the steering system dirt must not enter the steering circuit.
Otherwise malfunctions may occur because of foreign objects in the steering circuit.

8

Mount connection fitting ( 3 ) to steering gear ( 1 )

9

Mount pressure line ( 2 ) to connection fitting ( 3 )

10

Mount test connection ( 4 ) to connection fitting ( 3 )

11

Mount pressure gauge ( 6 ) with test hose ( 5 ) to test connection ( 4 )

 Pressure gage

*437589002100

 Test hose

*437589009000

Check hydraulic limiter for right and left steer

 Danger !

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

12

Start engine and run at an increased idle speed of approx. 800 rpm until the steering gear oil is heated up to approx. 50 °C

 Use a commercially available infrared-temperature measuring instrument to measure the oil temperature on the steering gear oil line.

13

Turn steering wheel with normal force of the hand up to the mechanical stop to the right


The mechanical end stop on the circumference of the steering wheel must not be pulled in the opposite direction for longer than a brief period (max. 5 seconds).
Otherwise damage could occur to the steering system.

14

On a steering wheel pulled opposite to the mechanical stop, read off the adjustment pressure of the pressure reduction valve on the pressure gauge ( 6 ) and note down

15

Perform check for right steer similar to procedure for left steer and note down

16

Compare noted values against adjustment pressure of pressure reduction valves

 If the noted values deviate from the specified values, the hydraulic limiter has to be adjusted. Perform operation steps 17 to 21. If the values match, continue with operation step 22.

Adjustment pressure of steering limiter valves

*BE46.20-N-1001-01G

Adjust hydraulic limiter for right and left steer

17

Remove cover ( 7 ) over adjustment screw for limiter at left ( 8 )

18

Adjust adjustment screw for left limiter ( 8 ) by turning it


During the adjustment procedure carefully turn the left limiter adjustment screw ( 8 ) at extremely low torque.
Otherwise the end stop on the left limiter adjustment screw ( 8 ) may be pushed out of its holder.

 Removing the left limiter adjustment screw ( 8 ) increases the value for the hydraulic limiter.

 Inserting the left limiter adjustment screw ( 8 ) reduces the value for the hydraulic limiter.

19

Turn steering wheel with normal force of the hand up to the stop to the left and observe the adjustment pressure of the left pressure reduction valve on the pressure gauge ( 6 )


The mechanical end stop on the circumference of the steering wheel must not be pulled in the opposite direction for longer than a brief period (max. 5 seconds).
Otherwise damage could occur to the steering system.

 If the specified value is not reached, the left limiter adjustment screw ( 8 ) has to be turned accordingly (see operation step 18). Repeat testing and adjustment procedure until the pressure reduction valve's adjusting pressure is correct.

Adjustment pressure of steering limiter valves

*BE46.20-N-1001-01G

20

Mount cover ( 7 ) over adjustment screw for limiter at left ( 8 )

21

Perform adjustment for right steer on right limiter adjustment screw ( 9 ), in the same manner as for the left steer

 Operation steps 17 to 20.

22

Turn off engine

23

Remove pressure gauge ( 6 ) with test hose ( 5 ) from test connection ( 4 )

24

Detach pressure line ( 2 ) from connection fitting ( 3 )

25

Detach connection fitting ( 3 ) from steering gear ( 1 )

26

Mount pressure line ( 2 ) to steering gear ( 1 )


When opening the steering system dirt must not enter the steering circuit.
Otherwise malfunctions may occur because of foreign objects in the steering circuit.

 Pressure line to steering gear

*BA46.20-N-1003-01H

27

Bleed steering system

Fill up steering gear oil and bleed

AR46.25-G-3001C

28

Close engine hood

 See information from vehicle manufacturer.

Test values for steering gear

Number

Designation

MODEL 436.330, 437.42/43/46
with steering ZF 8095

MODEL 437.467
with steering RBL C 700 V

BE46.20-N-1001-01G

Adjustment pressure of steering limiter valves

–

bar

50 (–10)

50 (–10)

Engine speed

1/min

800...850

800...850

Test values for steering gear

Number

Designation

MODEL 437.467 with steering HEMA 8098

BE46.20-N-1001-01G

Adjustment pressure of steering limiter valves

–

bar

50 (-10)

Engine speed

1/min

800...850

 Steering gear

Number

Designation

MODEL 437.467
mit Lenkung HEMA 8098

Model 437.467 with steering RBL C 700 V

BA46.20-N-1003-01H

Pressure line to steering gear

Nm

50

50